Acta mathematica scientia,Series B ›› 2021, Vol. 41 ›› Issue (5): 1493-1502.doi: 10.1007/s10473-021-0506-5

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COARSE ISOMETRIES BETWEEN FINITE DIMENSIONAL BANACH SPACES

Yuqi SUN, Wen ZHANG   

  1. School of Mathematical Science, Xiamen University, Xiamen 361005, China
  • Received:2020-05-20 Revised:2021-04-29 Online:2021-10-25 Published:2021-10-21
  • Contact: Wen ZHANG E-mail:wenzhang@xmu.edu.cn
  • Supported by:
    Supported by National Natural Science Foundation of China (11731010 and 12071388).

Abstract: Assume that $X$ and $Y$ are real Banach spaces with the same finite dimension. In this paper we show that if a standard coarse isometry $f:X\rightarrow Y$ satisfies an integral convergence condition or weak stability on a basis, then there exists a surjective linear isometry $U:X\rightarrow Y$ such that $\|f(x)-Ux\|=o(\|x\|)$ as $\|x\|\rightarrow\infty$. This is a generalization about the result of Lindenstrauss and Szankowski on the same finite dimensional Banach spaces without the assumption of surjectivity. As a consequence, we also obtain a stability result for $\varepsilon$-isometries which was established by Dilworth.

Key words: coarse isometry, linear isometry, finite dimensional Banach spaces

CLC Number: 

  • 46B04
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